Year; the calendar unit of one year (also used to refer to specific years like this year, last year).
来年は日本へ行く予定だ。
I plan to go to Japan next year.
１年は12か月です。
A year has 12 months.
去年は忙しい年だった。
Last year was a busy year.
Age; how many years old someone or something is.
彼は年を聞かれて答えなかった。
He was asked his age but did not answer.
子供の年に合わせてメニューを考える。
Plan the menu according to the child's age.
あの俳優は年の割に若く見える。
That actor looks young for his age.
Old age; being past one's prime—the decline or loss of youthful vigor associated with aging.
年を取ると体力が落ち、若いころのようには動けなくなる。
As one gets older, stamina declines and one can't move as they did in youth.
その選手は年を感じさせるプレーが増えてきた。
That player's play has increasingly shown signs of age.